Warning And Alarm Types - Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual

Maintenance, Diagnostics an...
OVC control Overvoltage control was activated in
parameter 2-17 Over-voltage Control, [2]
Enabled. The connected motor supplies the
frequency converter with generative energy.
The overvoltage control adjusts the V/Hz ratio
to run the motor in controlled mode and to
prevent the frequency converter from tripping.
PowerUnit Off (Only frequency converters with an external 24
V power supply installed).
Mains supply to the frequency converter was
removed, and the control card is supplied by
the external 24 V.
Protection md Protection mode is active. The unit has
detected a critical status (overcurrent or
overvoltage).
•
To avoid tripping, switching frequency is
reduced to 4 kHz.
•
If possible, protection mode ends after
approximately 10 s.
•
Protection mode can be restricted in
parameter 14-26 Trip Delay at Inverter Fault.
QStop The motor is decelerating using
parameter 3-81 Quick Stop Ramp Time.
•
Quick stop inverse was selected as a
function for a digital input (parameter
group 5-1* Digital Inputs). The
corresponding terminal is not active.
•
The quick stop function was activated via
serial communication.
Ramping The motor is accelerating/decelerating using
the active ramp up/down. The reference, a
limit value, or a standstill is not yet reached.
Ref. high The sum of all active references is above the
reference limit set in parameter 4-55 Warning
Reference High.
Ref. low The sum of all active references is below the
reference limit set in parameter 4-54 Warning
Reference Low.
Run on ref. The frequency converter is running in the
reference range. The feedback value matches
the setpoint value.
Run request A start command was given, but the motor
remains stopped until a run permissive signal
is received via digital input.
Running The motor is driven by the frequency
converter.
Sleep Mode The energy-saving function is enabled. The
motor has stopped, but restarts automatically
when required.
Speed high Motor speed is above the value set in
parameter 4-53 Warning Speed High.
MG20MC22
Operating Instructions
Speed low
Standby
Start delay
Start fwd/rev
Stop
Trip
Trip lock
Table 7.3 Operation Status
NOTICE!
In auto/remote mode, the frequency converter requires
external commands to execute functions.

7.3 Warning and Alarm Types

Warnings
A warning is issued when an alarm condition is impending
or when an abnormal operating condition is present and
may result in the frequency converter issuing an alarm. A
warning clears by itself when the abnormal condition
ceases.
Alarms
Trip
An alarm is issued when the frequency converter is
tripped, meaning that the frequency converter suspends
operation to prevent frequency converter or system
damage. The motor coasts to a stop. The frequency
converter logic continues to operate and monitor the
frequency converter status. After the fault condition is
remedied, the frequency converter can be reset. It is then
ready to start operation again.
Danfoss A/S © 01/2015 All rights reserved.
Motor speed is below the value set in
parameter 4-52 Warning Speed Low.
In Auto On mode, the frequency converter
starts the motor with a start signal from a
digital input or serial communication.
In parameter 1-71 Start Delay, a delay starting
time was set. A start command is activated
and the motor starts after the start delay time
expires.
Start forward and start reverse were selected as
functions for 2 different digital inputs
(parameter group 5-1* Digital Inputs). The
motor starts in forward or reverse direction
depending on which corresponding terminal is
activated.
The frequency converter has received a stop
command from the LCP, digital input, or serial
communication.
An alarm occurred and the motor is stopped.
Once the cause of the alarm is cleared, the
frequency converter can be reset manually by
pressing [Reset] or remotely by control
terminals or serial communication.
An alarm occurred and the motor is stopped.
Once the cause of the alarm is cleared, power
must be cycled to the frequency converter.
The frequency converter can then be reset
manually by pressing [Reset], or remotely by
control terminals or serial communication.
7 7
39